The release has fixes tracked by bug 701268 and no known regressions.
Some notable changes include:
* Bug 384107 adjust || preference to break dependency cycles, which solves bug 382421 and bug 703440.
* Bug 690436 limit scope of dropped circular dependencies, which should solve some cases of bug 199856 such as bug 703676 (also see tracker bug 689644).
* Bug 699986 emerge --quickpkg-direct option enables use of installed packages directly as binary packages. It can be used to create minimal runtime container images or initramfs images (which need not include a package manager), or to enable a live image to act as a binary installer that uses packages installed in the live image as a source of binary packages. This option is especially useful in combination with --usepkgonly and --ignore-soname-deps=n options, allowing implicit system dependencies such as libc to be automatically accounted for.
* Bug 703348 emerge --with-test-deps: allow circular deps.
Next stablereq is bug 711074.